4-Amino-1-((aminoacetyl)methylamino)-1,4-dideoxy-3-O-(2,6-diamino-2,3,4,6,7-pentadeoxy-beta-L-lyxo-heptopyranosyl)-6-O-methyl-L-chiro-inositol AIDS-187907 AIDS187907 Astromicin Fortimicin A